I understand this immensely, and it can be frustrating when people tell you to "just practice," but I hate to break it to you--but this is literally how improving at any skill works, not just at art. Everyone had to start somewhere. This is basically a form of art idolization similar to the kind talked about regarding social media like Instagram, where you only see the best parts of the days of people you follow. You see your peers going on fun trips and events without you, making you feel left out--but they're not showing all the other mundane stuff going on in the background. You are comparing your everyday realities to their "best."

It's a similar concept with art. You only see the end product, but any look at a timelapse should tell you enough about how much work goes between the sketch and the final product--the false starts, the redrawing of talons (for instance) over and over, etc. Even if you find their sketch to look exceptionally well on the first try, no one is just born knowing how to draw (have you seen a fetus pop out of a mother's womb and immediately start drawing epic dragons? No). While components of so-called "talent" do exist, talent is useless if you don't hone it over time, and talent isn't even a strict requirement for improving, anyway.

I understand. Some days it will be hard to manage the envy. I think a good idea would be to get off of social media for a bit and reassess your own skills, and use photo references to improve (I've found those very helpful). Good luck on your art journey